Improvement in door-checks



foot while adjusting the apparatus.

Unrrnn S'IArnsl Bnrrron roULsoN, 0F roar WAYNE, INDIANA.'

PATENT OFFICE.

IMPROVEMENT IN Doon-CHECKS.

Specification forming part of Letters Patent No. 137,237, dated March 25, 1873.

To all whom it may concern:

Be it known that I, BRrrfroNPoULsoN, of Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Door-Holders; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon, in which like letters refer to like parts in the diiferent iig- IIIGS.

To enable others skilled in the arts to make and use, my invention, I will proceed to describe its construction and operation.

In the drawing, Figure 1 is a front elevation. Fig. 2 is a side elevation.

The nature of my invention relates to the arrangement of an apparatus to be secured to the lower edge of a door, for the purpose of fastening the same in any desired position while open. This apparatus consists of an elastic wheel secured to one end of a suitable arm; said arm is pivoted at or near its center to a suitable base, upon which it oscillates freely, and is actuated by means of a helical spring; said arm extends from the pivot a suitable distance, where a footpiece is formed 5 at its other extremity, in a convenient position over the wheel, anotherv foot-piece is also formed, upon which the operator placesrllikis e base-plate is also provided with a projection, which subserves the purpose of a double stop for the lever, preventing it from passing a certain desired point at either extremity of its oscillation. Thus by pressing the wheel downward, so as to cause the wheel to impinge on the floor, the arm carrying the wheel strikes said stop, and its progress is arrested. On the other hand, when the wheel is relieved, the arm. being actuated by the helical spring, elevates said wheel to a point where the other arm impinges said projection, and is arrested, thus holding the wheel in an elevated position, as will be more fully described. l

In the drawing, A represents a wheel, which is made of any suitable elastic material cut in cylindrical rings. These rings are firmly clamped between suitable flanges, which form bearings for a stationary journal, a. Ax-

sents a foot-piece, which is formed at the front end of arm b, and is elevated above the wheel A, as seen in drawing. Base-plate cl is iianged so as to leave a space under saidplate. Within this space is situated a helical spring, 7L, the inner end of which is se cured to the pivot c for the purpose ofv actuating the arm b, while the outer end is secured to the base-plate. Said spring is' so adjusted as to support the arm b and wheel A in the position seen in full lines, Figs. 1 and 2, when the apparatus is not in actual use.

At the lower edge of the baseplate is a projection or stop, i, and an inclined surface. This stop and inclined surface subserve the double purpose of tightening or taking up any slack motion in the pivot c and holding the arm firmly, so as to prevent all lateral motion; also stopping or arresting the movement of the said arm, and confining it within the required limits.

Operation.

Secure the base-plate to the door in the required position, as seen by the broken section of the door in dotted lines. Open the door to any desired point, and place the toe of the foot on foot;piece g, and press it downward until the arm strikes stop fi. At this point the wheel will be thrown inthe position seen in dotted lines, Fig. 1, where it will impinge with considerable force on the surface of the iloor, and the door Will be firmly secured in position. Then the operator may apply pressure to the foot-piece f, which will relieve the wheel and the spring will immediately act to elevate thewheel to its original position, where it will be again arrested by stop i.

I do not claim, broadly, the use of an elastic wheel and pivot-arm, for I am aware that, as

applied to door-holders, these are not new; Wholebeing constructed, arranged, and operbut ating substantially as specified. What I claim as new, and desire to secure BRITTON POULSON.. by Letters Patent, is-

The combination of elastic Wheel A, pivot- Attest: ed arm b, base-plate d, spring h, inclined E. F. WILLSON, plane and stop i, and footpieces f and g, the S. R. BOLING. 

